ia64/linux-2.6.18-xen.hg

view arch/m32r/mm/init.c @ 647:a5bb490065f6

Fix the build after public header sync.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Wed Aug 13 14:01:49 2008 +0100 (2008-08-13)
parents 831230e53067
children
line source
1 /*
2 * linux/arch/m32r/mm/init.c
3 *
4 * Copyright (c) 2001, 2002 Hitoshi Yamamoto
5 *
6 * Some code taken from sh version.
7 * Copyright (C) 1999 Niibe Yutaka
8 * Based on linux/arch/i386/mm/init.c:
9 * Copyright (C) 1995 Linus Torvalds
10 */
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/mm.h>
15 #include <linux/pagemap.h>
16 #include <linux/bootmem.h>
17 #include <linux/swap.h>
18 #include <linux/highmem.h>
19 #include <linux/bitops.h>
20 #include <linux/nodemask.h>
21 #include <linux/pfn.h>
22 #include <asm/types.h>
23 #include <asm/processor.h>
24 #include <asm/page.h>
25 #include <asm/pgtable.h>
26 #include <asm/pgalloc.h>
27 #include <asm/mmu_context.h>
28 #include <asm/setup.h>
29 #include <asm/tlb.h>
31 /* References to section boundaries */
32 extern char _text, _etext, _edata;
33 extern char __init_begin, __init_end;
35 pgd_t swapper_pg_dir[1024];
37 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
39 void show_mem(void)
40 {
41 int total = 0, reserved = 0;
42 int shared = 0, cached = 0;
43 int highmem = 0;
44 struct page *page;
45 pg_data_t *pgdat;
46 unsigned long i;
48 printk("Mem-info:\n");
49 show_free_areas();
50 printk("Free swap: %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
51 for_each_online_pgdat(pgdat) {
52 unsigned long flags;
53 pgdat_resize_lock(pgdat, &flags);
54 for (i = 0; i < pgdat->node_spanned_pages; ++i) {
55 page = pgdat_page_nr(pgdat, i);
56 total++;
57 if (PageHighMem(page))
58 highmem++;
59 if (PageReserved(page))
60 reserved++;
61 else if (PageSwapCache(page))
62 cached++;
63 else if (page_count(page))
64 shared += page_count(page) - 1;
65 }
66 pgdat_resize_unlock(pgdat, &flags);
67 }
68 printk("%d pages of RAM\n", total);
69 printk("%d pages of HIGHMEM\n",highmem);
70 printk("%d reserved pages\n",reserved);
71 printk("%d pages shared\n",shared);
72 printk("%d pages swap cached\n",cached);
73 }
75 /*
76 * Cache of MMU context last used.
77 */
78 #ifndef CONFIG_SMP
79 unsigned long mmu_context_cache_dat;
80 #else
81 unsigned long mmu_context_cache_dat[NR_CPUS];
82 #endif
83 static unsigned long hole_pages;
85 /*
86 * function prototype
87 */
88 void __init paging_init(void);
89 void __init mem_init(void);
90 void free_initmem(void);
91 #ifdef CONFIG_BLK_DEV_INITRD
92 void free_initrd_mem(unsigned long, unsigned long);
93 #endif
95 /* It'd be good if these lines were in the standard header file. */
96 #define START_PFN(nid) \
97 (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
98 #define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
100 #ifndef CONFIG_DISCONTIGMEM
101 unsigned long __init zone_sizes_init(void)
102 {
103 unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
104 unsigned long max_dma;
105 unsigned long low;
106 unsigned long start_pfn;
108 #ifdef CONFIG_MMU
109 start_pfn = START_PFN(0);
110 max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
111 low = MAX_LOW_PFN(0);
113 if (low < max_dma){
114 zones_size[ZONE_DMA] = low - start_pfn;
115 zones_size[ZONE_NORMAL] = 0;
116 } else {
117 zones_size[ZONE_DMA] = low - start_pfn;
118 zones_size[ZONE_NORMAL] = low - max_dma;
119 }
120 #else
121 zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
122 zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
123 start_pfn = __MEMORY_START >> PAGE_SHIFT;
124 #endif /* CONFIG_MMU */
126 free_area_init_node(0, NODE_DATA(0), zones_size, start_pfn, 0);
128 return 0;
129 }
130 #else /* CONFIG_DISCONTIGMEM */
131 extern unsigned long zone_sizes_init(void);
132 #endif /* CONFIG_DISCONTIGMEM */
134 /*======================================================================*
135 * paging_init() : sets up the page tables
136 *======================================================================*/
137 void __init paging_init(void)
138 {
139 #ifdef CONFIG_MMU
140 int i;
141 pgd_t *pg_dir;
143 /* We don't need kernel mapping as hardware support that. */
144 pg_dir = swapper_pg_dir;
146 for (i = 0 ; i < USER_PTRS_PER_PGD * 2 ; i++)
147 pgd_val(pg_dir[i]) = 0;
148 #endif /* CONFIG_MMU */
149 hole_pages = zone_sizes_init();
150 }
152 int __init reservedpages_count(void)
153 {
154 int reservedpages, nid, i;
156 reservedpages = 0;
157 for_each_online_node(nid) {
158 unsigned long flags;
159 pgdat_resize_lock(NODE_DATA(nid), &flags);
160 for (i = 0 ; i < MAX_LOW_PFN(nid) - START_PFN(nid) ; i++)
161 if (PageReserved(nid_page_nr(nid, i)))
162 reservedpages++;
163 pgdat_resize_unlock(NODE_DATA(nid), &flags);
164 }
166 return reservedpages;
167 }
169 /*======================================================================*
170 * mem_init() :
171 * orig : arch/sh/mm/init.c
172 *======================================================================*/
173 void __init mem_init(void)
174 {
175 int codesize, reservedpages, datasize, initsize;
176 int nid;
177 #ifndef CONFIG_MMU
178 extern unsigned long memory_end;
179 #endif
181 num_physpages = 0;
182 for_each_online_node(nid)
183 num_physpages += MAX_LOW_PFN(nid) - START_PFN(nid) + 1;
185 num_physpages -= hole_pages;
187 #ifndef CONFIG_DISCONTIGMEM
188 max_mapnr = num_physpages;
189 #endif /* CONFIG_DISCONTIGMEM */
191 #ifdef CONFIG_MMU
192 high_memory = (void *)__va(PFN_PHYS(MAX_LOW_PFN(0)));
193 #else
194 high_memory = (void *)(memory_end & PAGE_MASK);
195 #endif /* CONFIG_MMU */
197 /* clear the zero-page */
198 memset(empty_zero_page, 0, PAGE_SIZE);
200 /* this will put all low memory onto the freelists */
201 for_each_online_node(nid)
202 totalram_pages += free_all_bootmem_node(NODE_DATA(nid));
204 reservedpages = reservedpages_count() - hole_pages;
205 codesize = (unsigned long) &_etext - (unsigned long)&_text;
206 datasize = (unsigned long) &_edata - (unsigned long)&_etext;
207 initsize = (unsigned long) &__init_end - (unsigned long)&__init_begin;
209 printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
210 "%dk reserved, %dk data, %dk init)\n",
211 (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
212 num_physpages << (PAGE_SHIFT-10),
213 codesize >> 10,
214 reservedpages << (PAGE_SHIFT-10),
215 datasize >> 10,
216 initsize >> 10);
217 }
219 /*======================================================================*
220 * free_initmem() :
221 * orig : arch/sh/mm/init.c
222 *======================================================================*/
223 void free_initmem(void)
224 {
225 unsigned long addr;
227 addr = (unsigned long)(&__init_begin);
228 for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
229 ClearPageReserved(virt_to_page(addr));
230 init_page_count(virt_to_page(addr));
231 free_page(addr);
232 totalram_pages++;
233 }
234 printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", \
235 (int)(&__init_end - &__init_begin) >> 10);
236 }
238 #ifdef CONFIG_BLK_DEV_INITRD
239 /*======================================================================*
240 * free_initrd_mem() :
241 * orig : arch/sh/mm/init.c
242 *======================================================================*/
243 void free_initrd_mem(unsigned long start, unsigned long end)
244 {
245 unsigned long p;
246 for (p = start; p < end; p += PAGE_SIZE) {
247 ClearPageReserved(virt_to_page(p));
248 init_page_count(virt_to_page(p));
249 free_page(p);
250 totalram_pages++;
251 }
252 printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
253 }
254 #endif